As such you can't. All you can do is put some security on (I suggest you use WPA) if you are super worried you could also add MAC binding. That way it will only allow PC's that you specify to connect (this is a pain to administer)

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You might be better off creating a free account at opendns.com Then point your router to use their dns servers rather than your isp's. Use the parental controls at opendns to block certain sites for all phones, pcs and laptops in your home. Full instructions on their website.

1. Many wireless routers are using the same wirelesschannel. Many manufacturers choose channel 6 as the default.2. Analogue video senders used to send audio and video toother TVs in the home.3. Microwave ovens emit interference in the 2.4GHz band.4. Wireless speakers and console controllers can causeinterference with the wireless router.5. Bluetooth devices, newer Bluetooth devices can jump todifferent frequencies if there is a connection problem.6. Power cables located near the wireless router can causedrop outs and speed reduction.7. Fish tanks will cause massive Wi-Fi shadow on the otherside of the tank from the wireless router. 8. Depending upon the location of large mirrors will reflectwireless signal away your computer.9. Building materials will block wireless signals such asplasterboards with metal foil, reinforced concrete walls and floors. Alsoobjects near the wireless router such as metal filing cabinets and otherelectrical appliances. 10. Blinking Christmas lights can reduce Wi-Fi performanceby 25% when it is close to the wireless router.

1. Many wireless routers are using the same wirelesschannel. Many manufacturers choose channel 6 as the default.2. Analogue video senders used to send audio and video toother TVs in the home.3. Microwave ovens emit interference in the 2.4GHz band.4. Wireless speakers and console controllers can causeinterference with the wireless router.5. Bluetooth devices, newer Bluetooth devices can jump todifferent frequencies if there is a connection problem.6. Power cables located near the wireless router can causedrop outs and speed reduction.7. Fish tanks will cause massive Wi-Fi shadow on the otherside of the tank from the wireless router. 8. Depending upon the location of large mirrors will reflectwireless signal away your computer.9. Building materials will block wireless signals such asplasterboards with metal foil, reinforced concrete walls and floors. Alsoobjects near the wireless router such as metal filing cabinets and otherelectrical appliances. 10. Blinking Christmas lights can reduce Wi-Fi performanceby 25% when it is close to the wireless router.

You need to access the Setup page of Dlink DIR 300 wireless router:1. Use a working computer that is hard wired to the router. 2. Open a Web Browser (IE, Firefox etc.) on the computer.3. In the address bar of the browser type http://192.168.0.1 and press Enter.4. When the login window appears, set the user name to admin and leave the password box empty. Click OK to continue.(Note: If you setup your own Usename and Password on your router please use those info to login instead of using the default)You will then see the Setup page of the router. 5. CLick on the ADVANCED tab. 6. On the left side of the screen Click on Parental Control. 7. On the "Configure Parental Control below: " select the option "Turn Parental Control ON and DENY computers access to ONLY these sites".8. ON the "Website URL" tyoe in the website that you want to block9. Click on the Save settings button.

Once completed then the sites you entered are completely denied and blocked on your router.

Verizon Home DSL service uses a special filter that prevents ALL incomming connection including web, email and VPN hosting from a home connection. Business internet does not limit this, and I don't believe FIOS blocks it. If you have verizon home, there's nothing you can do. If you're just trying to connect to a home machine, you can try something like gotomypc, or a free alternative like teamviewer.com or logmein.com.

If you don't have verizon home dsl, comment back with what service you do have, and we can try some other things.